Compute Library
 20.05
accumulate.cl
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24 #include "helpers.h"
25 
26 /** This function accumulates an input image into output image.
27  *
28  * @param[in] input_ptr Pointer to the source image. Supported data types: U8
29  * @param[in] input_stride_x Stride of the source image in X dimension (in bytes)
30  * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes)
31  * @param[in] input_stride_y Stride of the source image in Y dimension (in bytes)
32  * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes)
33  * @param[in] input_offset_first_element_in_bytes The offset of the first element in the source image
34  * @param[out] accu_ptr Pointer to the destination image. Supported data types: S16
35  * @param[in] accu_stride_x Stride of the destination image in X dimension (in bytes)
36  * @param[in] accu_step_x accu_stride_x * number of elements along X processed per workitem(in bytes)
37  * @param[in] accu_stride_y Stride of the destination image in Y dimension (in bytes)
38  * @param[in] accu_step_y accu_stride_y * number of elements along Y processed per workitem(in bytes)
39  * @param[in] accu_offset_first_element_in_bytes The offset of the first element in the destination image
40  */
41 __kernel void accumulate(
43  IMAGE_DECLARATION(accu))
44 {
45  // Get pixels pointer
47  Image accu = CONVERT_TO_IMAGE_STRUCT(accu);
48 
49  // Load data
50  uchar16 in_data = vload16(0, input.ptr);
51  short16 accu_data = vload16(0, (__global short *)accu.ptr);
52 
53  // Perform accumulation
54  short16 res = add_sat(convert_short16(in_data), accu_data);
55 
56  // Store result
57  vstore16(res, 0, (__global short *)accu.ptr);
58 }
59 
60 /** This function accumulates a weighted value from an input image to an output image.
61  *
62  * @param[in] input_ptr Pointer to the source image. Supported data types: U8
63  * @param[in] input_stride_x Stride of the source image in X dimension (in bytes)
64  * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes)
65  * @param[in] input_stride_y Stride of the source image in Y dimension (in bytes)
66  * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes)
67  * @param[in] input_offset_first_element_in_bytes The offset of the first element in the source image
68  * @param[out] accu_ptr Pointer to the destination image. Supported data types: S16
69  * @param[in] accu_stride_x Stride of the destination image in X dimension (in bytes)
70  * @param[in] accu_step_x accu_stride_x * number of elements along X processed per workitem(in bytes)
71  * @param[in] accu_stride_y Stride of the destination image in Y dimension (in bytes)
72  * @param[in] accu_step_y accu_stride_y * number of elements along Y processed per workitem(in bytes)
73  * @param[in] accu_offset_first_element_in_bytes The offset of the first element in the destination image
74  * @param[in] alpha The float scalar value with a value in the range of 0 to 1
75  */
76 __kernel void accumulate_weighted(
78  IMAGE_DECLARATION(accu),
79  const float alpha)
80 {
81  // Get pixels pointer
83  Image accu = CONVERT_TO_IMAGE_STRUCT(accu);
84 
85  // Load data
86  const float16 in_data = convert_float16(vload16(0, input.ptr));
87  const float16 accu_data = convert_float16(vload16(0, accu.ptr));
88 
89  // Calculate weighted accumulation
90  const uchar16 res = convert_uchar16((1.0f - alpha) * accu_data + alpha * in_data);
91 
92  // Store result
93  vstore16(res, 0, accu.ptr);
94 }
95 
96 /** This function accumulates a squared value from an input image to an output image.
97  *
98  * @param[in] input_ptr Pointer to the source image. Supported data types: U8
99  * @param[in] input_stride_x Stride of the source image in X dimension (in bytes)
100  * @param[in] input_step_x input_stride_x * number of elements along X processed per workitem(in bytes)
101  * @param[in] input_stride_y Stride of the source image in Y dimension (in bytes)
102  * @param[in] input_step_y input_stride_y * number of elements along Y processed per workitem(in bytes)
103  * @param[in] input_offset_first_element_in_bytes The offset of the first element in the source image
104  * @param[out] accu_ptr Pointer to the destination image. Supported data types: S16
105  * @param[in] accu_stride_x Stride of the destination image in X dimension (in bytes)
106  * @param[in] accu_step_x accu_stride_x * number of elements along X processed per workitem(in bytes)
107  * @param[in] accu_stride_y Stride of the destination image in Y dimension (in bytes)
108  * @param[in] accu_step_y accu_stride_y * number of elements along Y processed per workitem(in bytes)
109  * @param[in] accu_offset_first_element_in_bytes The offset of the first element in the destination image
110  * @param[in] shift The U32 scalar value with a value in the range of 0 to 15
111  */
112 __kernel void accumulate_squared(
114  IMAGE_DECLARATION(accu),
115  const uint shift)
116 {
117  // Get pixels pointer
119  Image accu = CONVERT_TO_IMAGE_STRUCT(accu);
120 
121  // Load data
122  ushort16 in_data = convert_ushort16(vload16(0, input.ptr));
123  uint16 accu_data = convert_uint16(vload16(0, (__global short *)accu.ptr));
124 
125  // Calculate squared accumulation
126  short16 res = convert_short16_sat(accu_data + convert_uint16((in_data * in_data) >> shift));
127 
128  // Store result
129  vstore16(res, 0, (__global short *)accu.ptr);
130 }
#define CONVERT_TO_IMAGE_STRUCT(name)
Definition: helpers.h:311
#define IMAGE_DECLARATION(name)
Definition: helpers.h:275
__kernel void accumulate_squared(__global uchar *input_ptr, uint input_stride_x, uint input_step_x, uint input_stride_y, uint input_step_y, uint input_offset_first_element_in_bytes, __global uchar *accu_ptr, uint accu_stride_x, uint accu_step_x, uint accu_stride_y, uint accu_step_y, uint accu_offset_first_element_in_bytes, const uint shift)
This function accumulates a squared value from an input image to an output image.
Definition: accumulate.cl:112
uint8_t add_sat(const uint8_t &a, const uint8_t &b)
Definition: add.h:33
Structure to hold Image information.
Definition: helpers.h:349
__global uchar * ptr
Pointer to the starting postion of the buffer.
Definition: helpers.h:351
__kernel void accumulate_weighted(__global uchar *input_ptr, uint input_stride_x, uint input_step_x, uint input_stride_y, uint input_step_y, uint input_offset_first_element_in_bytes, __global uchar *accu_ptr, uint accu_stride_x, uint accu_step_x, uint accu_stride_y, uint accu_step_y, uint accu_offset_first_element_in_bytes, const float alpha)
This function accumulates a weighted value from an input image to an output image.
Definition: accumulate.cl:76
__kernel void accumulate(__global uchar *input_ptr, uint input_stride_x, uint input_step_x, uint input_stride_y, uint input_step_y, uint input_offset_first_element_in_bytes, __global uchar *accu_ptr, uint accu_stride_x, uint accu_step_x, uint accu_stride_y, uint accu_step_y, uint accu_offset_first_element_in_bytes)
This function accumulates an input image into output image.
Definition: accumulate.cl:41